Bifurcation theory of poloidal rotation in tokamaks: A model for L-H transition

K. C. Shaing, E. C. Crume

Research output: Contribution to journalArticlepeer-review

606 Citations (Scopus)

Abstract

It is shown that the poloidal momentum balance equation in tokamaks has bifurcated solutions. The poloidal flow velocity Up can suddenly become more positive when the ion collisionality decreases. The corresponding radial electric field Er becomes more negative and hence suppresses the turbulent fluctuations. Thus, plasma confinement is improved. The theory is employed to explain the L-H transition observed in tokamaks.

Original languageEnglish
Pages (from-to)2369-2372
Number of pages4
JournalPhysical review letters
Volume63
Issue number21
DOIs
Publication statusPublished - 1989 Jan 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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